Radon contractor licensing vs. certification in Utah

Two different credentials get mixed up online. Here's what Utah law requires, what it doesn't, and the questions that actually protect you.

The short version.

License: required. Since 2009, Utah law says installing, repairing or replacing a radon mitigation system must be done by a licensed contractor (Source: Utah DEQ). A handyman registration doesn't count (Source: Utah DEQ).
NRPP certification: recommended. It's a national credential for radon professionals. Utah DEQ tells consumers to look for a licensed contractor with NRPP certification (Source: Utah DEQ). A 2026 bill that would have required certification for all installers did not pass (Source: bill tracker).

That's why we describe our referrals as licensed Utah contractors, and we recommend asking about NRPP certification.

What Utah law requires: a contractor's license

Senate Bill 163 (2009) ended the exemption that let radon mitigation providers work without a contractor's license. Since May 12, 2009, "installation, repair, or replacement of a radon mitigation system or a soil depressurization system must be performed by a licensed contractor" (Source: Utah DEQ).

Utah's licensing division (DOPL) has a radon mitigation specialty classification, S354. Several broader classifications can also install radon systems within the scope of their license if they hold radon mitigation certification: B100, R100, S200, S210 and S350 (Source: Utah DEQ). The rules are in Utah Administrative Code R156-55a (Source: Utah Admin. Code R156-55a). According to DEQ, unlicensed contracting is a class A misdemeanor (Source: Utah DEQ).

Passive systems in new homes are a narrower case: a 2016 rule change lets B100 and R100 builders install passive radon controls in new construction under building-code requirements (Source: Utah Admin. Code R156-55a).

What certification means

NRPP (National Radon Proficiency Program) certifies radon measurement and mitigation professionals. It requires training and an exam and keeps a list of certified individuals. Utah DEQ's consumer guidance asks you to verify the provider is "a qualified Utah licensed contractor, with a National Radon Proficiency Program certification" (Source: Utah DEQ).

So DEQ recommends both, but the legal minimum for doing the work is the license.

What happened in 2026: H.B. 563

H.B. 563, "Radon Amendments" (2026 General Session), would have required anyone who installs, repairs, maintains or sells radon mitigation systems to complete training and certification, with limited supervised exceptions (Source: Utah Legislature). It was returned to the House Rules Committee on March 2, 2026, and filed after a strike-enacting-clause motion on March 6, 2026. It did not become law (Source: bill tracker).

So as of October 22, 2026, Utah still requires a license but not NRPP certification for every installer. If that changes, we'll update this page.

How to check a contractor in 2 minutes

Look up the license on DOPL's licensee lookup (Source: DOPL license lookup). Search the business or owner name and confirm the license is active and in a classification that covers radon work (S354 or one of the classes above).
Ask about certification. "Does the person designing and installing my system hold NRPP certification? What's the certification number?" Then check it on the NRPP website.
Ask for proof of liability insurance and references, per DEQ's checklist (Source: Utah DEQ).
Get it in writing: the system design, warning device, post-install test and warranty. See the full checklist on our cost page.

Where we stand

We're a referral service, not a contractor, and we hold no radon license or certification ourselves. We only refer licensed Utah contractors. We don't claim NRPP certification for anyone, and we suggest you ask every contractor about it, including the ones we refer. How our referrals work.

Sources

Last reviewed October 22, 2026.

State qualifications for radon mitigation professionals, Utah Department of Environmental Quality. Accessed October 22, 2026.
Become a radon certified professional in Utah, Utah Department of Environmental Quality. Accessed October 22, 2026.
HB0563 Radon Amendments: status (strike enacting clause, filed March 6, 2026), Better Utah Institute bill tracker. Accessed October 22, 2026.
R156-55a, Utah Construction Trades Licensing Act Rule, Utah Office of Administrative Rules. Accessed October 22, 2026.
H.B. 563 Radon Amendments (2026 General Session), introduced text, Utah State Legislature. Accessed October 22, 2026.
Licensee lookup and verification, Utah Division of Professional Licensing. Accessed October 22, 2026.